Can you used synthetic oil in 1999 Lexus ls400?

Yes, you can use synthetic oil in a 1999 Lexus LS400. Synthetic oils are specially formulated to provide superior performance and protection for engines, and are compatible with most vehicles, including the 1999 Lexus LS400. Synthetic oils offer several advantages over conventional oils, such as improved lubrication, reduced wear and tear, and better fuel efficiency.